Red-Stone can be found deep underground in randomly generated cave systems. Normally around 15-20 blocks down from water level. If you start to find Gold,Diamonds,Lava or Lapis Lazuli, then you will most probably be near some Red-Stone.

You will then need to use a crafting table to craft the Dispenser.

If you find this solution to be unhelpful, please tell me why in a comment and I will update it the next time I'm online.

There are 15 comments relating to this Solution | Please log in to comment on this solution.